Hitachi VT-FX8000E Service Manual page 79

"OPEN": When microprocessor is initialized)
sP
Tape speed control. PAL/NTSC SP mode: "L"
vo Abbreviation Function No. | YO fae Abbreviation Function
I Pulse | CTLAMP 13 CTL amp input 79 i} Hi/Lo MESECAM DET MESECAM signal detection input. When MESECAM signal detected: "H". Not
{e) Pulse | CTL AMP (0) CTL amp output connected and fixed at "L" for PAL models, not handling MESECAM signal.
1 Pulse | DRUMFG Drum FG input 80 ° Hi REC led ey Geto eimai LED control signal. During REC, REC
eae oe FG a = a cal 81 ie) Hi MTS MUTE Tuner audio muting signal. During playback, line input:
During MPX muting for channel switching: "H"
; = Veo (SRV) S5V power supply for SAV 82 1 Pulse | IR. IN Remote control receiving signal
! sce [Vee (OSD) S5V power supply for OSD a3 | Oo] Hi | 358/443 Y/C equalizer control signal, 4.43 MODE: "L', 3.58 MODE: "H™
| — _ _ | CVIN Video signal input (2 Vp-p, with sync tip clamp circuit) O | Lo | IRSELECT Control signal to inhibit remote control input during AV bus communications
I - Vref Reference bias, clamp bias monitor pin B4 1 Hi CCD CE CCD microprocessor chip enable
Oe ECV OUT Composite video signal output (2 Vp-p) 85| 0 | — | TIMESIGNAL Audio time signal input for clock setting,
I - CHAR Bias For externally adjusting character luminance level 86 1 lo EST End sensor inputs.
! = AFC LPF An LPF for AFC is externally attached. a7 1 Lo ESS 1. Used to detect whether or not a cassette is loaded into the US mechanism.
I # AFC OSC Oscillator for AFC With cassette: ESS or EST is "H".
t a GND (OSD) Ground i Without cassette: Both ESS and EST are "L".
| | Pulse | DOSCIN LC or RC oscillator for generating dot clock 2. Tees eee rated eesti Teese Sear awit pee ae
2 Pulse feb es generaling dot. clock 88 I Pulse | T. REEL Reel pulses for detecting rotation of take-up reel disk
7 89 I Pulse | S. REEL Reel pulses for detecting rotation of supply reel disk |
t - 4fsc IN 4fsc or 2fsc oscillator 5 aan
| Pulse | C. SYNC C.SYNG input for video output 90 I ; Lo CHECK Signal to detect short-circuit in S5V, S9V, PS5V and PSOV. 2
7 eet 91 O | Hi/Mid/Lo | V. CAP. CONT 2 Sets capstan motor voltage during playback, fast forward/rewind and slow.
ie} Hi BLUE BACK H" during OSD blue background | 777; V.CAP. CONT
Oo} Hi | HIFIREC Hi-Fi audio recording signal. REC and V.DUB: "H'. REC PAUSE and V.DUB Bie, SHUM NCAR crew PB/REGISR
PAUSE: "L", FF/REW 91,94 | V
57 | /O| Pulse 12C DATA (AV) 12C communication data signal During S.L acceleration HH |.7.5
58 fe) Pulse 12C CLK (AV) 12C communication clock signal ee a # 2
59 fe) Lo PB Sets the video system to the playback mode. During playback: "L". More than SPX6 =
60 fe) Hi REVERSE Capstan motor reverse control output ("H" for reverse drive) Low-speed FF/REW
61 fe) Hi A. REC Linear audio recording signal. REC, A.DUB and A.DUB PAUSE: "H". REC 13.5 V in modes other than above
PAUSE. iC: (pins 91. and 94 are "L") Bake
62 | 0 Hi CTL RESET Adds reset pulse to CTL during REVERSE SLOW. SP ACCEL
63 fe) - X' TAL CHG OSD 14MHz/17MHz crystal switching signal. 14MHz (NTSC): "L", g2 | VO} Pulse 12C DATA 12C communication data signal
17MHz (PAL): "H" 93 | O| Pulse | 12C CLOCK 12C communication clock signal
64 ic] Hi AV BUS OUT AV bus control signal 95 ie} Pulse | CCD CLOCK Clock signal for CCD communications
I Lo CK DET IN Video killer detection signal. PLL locked: "L", PLL unlocked: "H" 96 1 Pulse | CCD DATAIN CCD data input
65 oO Hi LiM2 (UNLOAD) Loading motor control outputs. 97 O° Pulse | CCD DATA OUT CCD data output
665 OAH | EMLOAD) Loading | Unloading 98 | O| Pulse | LCD CLOCK Clock for serial data output to LCD
LM1 (LOAD) H L gg [Oo Hi LCD CE Data load signal to LCD
LM2 (UNLOAD) L H fe) CCD DATA Serial data to LCD
67 ie} Hi/Lo LM CONT Loading motor voltage control output
68 = = TEST Ground
69 1 - XCIN For the connection of 32.768kHz crystal oscillator (tolerance: within +5 ppm)
70 fe} - XCOUT
71 1 = GND Ground
72 1 - XIN For the connection of 10MHz ceramic oscillator (tolerance: within +0.50 ppm)
73 fe} = XOUT
74 ie) Hi L. MUTE Audio output system muting control. "H"; Muting ON (used in common with FTZ
muting)
75 VO Hi/Lo CAPS Q.R Capstan control signal. "H": Voltage control, "OPEN": Servo control, "L":
Braking
76 | VO} Hi/Lo DRUM Q. R Cylinder control signal. Horizontal jitter correction.
7 fe} Hi POWER CONT Switches S power supply on and off. "H": Power ON, "L": Power OFF (or